1. 隔膜压力表的特性有哪些
    信息来源: 华恒 | [ 2019-04-29] 点击量: 214


      What are the characteristics of the diaphragm pressure gauge?Introduction of Xi'an Huaheng Instrument:The characteristics of diaphragm pressure gauge are as follows:
      1.Selection of filling fluid for diaphragm pressure gauge:Silicone oil and glycerin are the most commonly used working fluid filled in the spring tube of diaphragm pressure gauge.Fluorinated oil or vegetable oil or mercury can also be selected according to different working conditions or measuring media.
      2.Medium selection of diaphragm pressure gauge:the measured medium has strong corrosiveness(such as hydrochloric acid,wet chlorine,ferric chloride),high viscosity(such as latex),easy crystallization(such as salt water),easy solidification(such as hot asphalt),solid plankton(such as sewage),these media can use diaphragm pressure gauge.
      3.Temperature influence of diaphragm pressure gauge:The normal working temperature of diaphragm pressure gauge is-20-60 C;the temperature influence of diaphragm pressure gauge is related to the sealing coefficient,diaphragm stiffness and the temperature of the pressure position.When the ambient temperature of the diaphragm pressure gauge deviates from 20+5 C,the maximum change rate of the indication value affected by temperature is not more than 0.1%/C,and the flexibility(remote connection)is not more than 0.1+0.025 L%/C(L is the length of the pressure transfer conduit m).The temperature of the diaphragm pressure gauge is related to the expansion coefficient of the sealing liquid,the stiffness of the diaphragm and the pressure temperature.The lower the range,the more obvious this phenomenon is.
      4.The liquid level difference of the diaphragm pressure gauge shows that when the pressure part of the diaphragm pressure gauge is in different position with the general pressure gauge,the influence of the liquid level difference on the pressure should be taken into account,only for the connection of the diaphragm pressure gauge with the hose.(The pressure difference of 1 m is about 0.01 MPa when the ratio of working fluid to mass is equal to 1).